We've added controls to restrict the access to the page editing capabilities.
If you are having troubles with the access controls, make your questions here.
What must you do to get it working again?
You must open FTP and create a file.
call the file access_control.php
fill the contents of that file with the contents of the textarea box that pops up on the error page.
place the file into your /ct folder.
You might need to change the permissions on the file to 755 to get it to work.
If you want to allow a range of IP's you can enter them like this.
'192.168.3.1 256.222.12.3 192.168.2.1'
Break them up by spaces.